Best Time to Fly LAS to ATL: On-Time Stats by Hour & Airline
Harry Reid International → Hartsfield-Jackson Atlanta International
Data through July 2026 · Last updated October 18, 2026
4,771 flights were scheduled from Las Vegas (LAS) to Atlanta (ATL) in the last 12 months, and 84.6% of those that flew arrived on time, 6.9 points above the US average of 77.6%.
Among 4 airlines, Delta Air Lines led with 86.5% on time and Frontier Airlines was last with 74.9%.
Over 24 months, Wednesday was the most reliable day (90% on time) and July the worst month (73%).
The cancellation rate was 0.9% (US average 1.8%).
LAS to ATL on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Lines | 86.5% | 79 min | 0.8% | 3,322 |
| Spirit Airlines | 86.3% | 74 min | 0.7% | 154 |
| Southwest Airlines | 82.9% | 39 min | 0.6% | 720 |
| Frontier Airlines | 74.9% | 73 min | 1.6% | 575 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly LAS to ATL
On-time arrival % by scheduled departure hour (local time), 9,815 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | 78.4% | 1.8% | 492 |
| 5am–6am | 86.2% | 0.0% | 58 |
| 6am–7am | 93.4% | 1.1% | 1,028 |
| 7am–8am | 90.9% | 1.0% | 929 |
| 8am–9am | 82.2% | 0.3% | 369 |
| 9am–10am | 87.1% | 0.5% | 648 |
| 10am–11am | 84.5% | 1.1% | 458 |
| 11am–12pm | 84.4% | 0.7% | 613 |
| 12pm–1pm | 78.6% | 1.2% | 738 |
| 1pm–2pm | 83.6% | 0.8% | 523 |
| 2pm–3pm | 79.9% | 0.6% | 705 |
| 3pm–4pm | 86.4% | 0.0% | 118 |
| 4pm–5pm | 80.0% | 0.0% | 121 |
| 5pm–6pm | 82.0% | 0.2% | 412 |
| 6pm–7pm | 72.5% | 1.0% | 99 |
| 8pm–9pm | Limited data | 3 | |
| 9pm–10pm | 62.9% | 6.2% | 112 |
| 10pm–11pm | 84.3% | 0.5% | 747 |
| 11pm–12am | 81.4% | 1.1% | 1,642 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on LAS to ATL
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 93.7% | +8.3 pts | 0.0% | 190 |
| Christmas & New Year (Dec 20 - Jan 3) | 86.5% | +1.1 pts | 0.5% | 409 |
| Summer peak (Jun 15 - Aug 15) | 75.9% | -9.4 pts | 1.8% | 1,665 |
| All other days | 85.3% | — | 0.8% | 7,551 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).